On April 30, associates who were gathered in a conference room
handed Mr. Dimon summaries and analyses of the losses. But there
were no details about the trades themselves. "I want to see the
positions!" he barked, throwing down the papers, according to
attendees. "Now! I want to see everything!"

When Mr. Dimon saw the numbers, these people say, he couldn't
breathe.

Here's the loss estimate the Langley reports:

Those trading positions have produced losses that could total as much as $5
billion...

Langley's sources appear to be very close to Dimon. Her
story includes an exchange between Dimon and his wife and also
references an evening fueled by vodka.

More on those trades:

Mr. Dimon personally
approved the concept behind the disastrous
trades, according to people familiar with the
matter. But he didn't monitor how they were executed, triggering
some resentment among other business chiefs who say the
activities of their units are routinely and vigorously
scrutinized.

Langley's report includes a play-by-play of the drama that ensued
after Dimon found out about the losses.